Temperature
Hot by day, warm at night.
Shiyan is most comfortable in April and October. Summers are hot and winters are cool. The wettest months are roughly June to September.

Hot by day, warm at night.
One of the wettest months.
Cloudier spells limit sunshine.
Hot days with humid air through much of the month.
In August, afternoons feel about 84° and nights feel near 90°.
Mostly cloudy skies.
August late afternoons are around 78°F, easing to about 76°F in early evening.
Calm winds are typical in August.
Want a side-by-side climate view? Compare Shiyan with Tokyo.
Typical monthly values are based on long-term climate records. Useful for planning, not a forecast. Check the weather before you travel.
Local microclimates can vary by beach, neighborhood, trail, or elevation.
Last updated: Jul 27, 2026
Data & methodology